mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-21 08:45:06 +02:00
186 lines
5.4 KiB
C
186 lines
5.4 KiB
C
/*
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* V210 decoder
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*
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* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "internal.h"
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#include "v210dec.h"
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#include "libavutil/bswap.h"
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#define READ_PIXELS(a, b, c) \
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do { \
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val = av_le2ne32(*src++); \
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*a++ = val & 0x3FF; \
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*b++ = (val >> 10) & 0x3FF; \
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*c++ = (val >> 20) & 0x3FF; \
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} while (0)
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static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
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{
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uint32_t val;
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int i;
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for( i = 0; i < width-5; i += 6 ){
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READ_PIXELS(u, y, v);
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READ_PIXELS(y, u, y);
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READ_PIXELS(v, y, u);
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READ_PIXELS(y, v, y);
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}
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}
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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V210DecContext *s = avctx->priv_data;
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if (avctx->width & 1) {
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av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
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return AVERROR_INVALIDDATA;
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}
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avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
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avctx->bits_per_raw_sample = 10;
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s->unpack_frame = v210_planar_unpack_c;
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if (HAVE_MMX)
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v210_x86_init(s);
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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AVPacket *avpkt)
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{
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V210DecContext *s = avctx->priv_data;
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int h, w, ret, stride, aligned_input;
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AVFrame *pic = data;
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const uint8_t *psrc = avpkt->data;
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uint16_t *y, *u, *v;
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if (s->custom_stride )
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stride = s->custom_stride;
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else {
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int aligned_width = ((avctx->width + 47) / 48) * 48;
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stride = aligned_width * 8 / 3;
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}
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if (avpkt->size < stride * avctx->height) {
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if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
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stride = avpkt->size / avctx->height;
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if (!s->stride_warning_shown)
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av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
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s->stride_warning_shown = 1;
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} else {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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}
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aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
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if (aligned_input != s->aligned_input) {
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s->aligned_input = aligned_input;
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if (HAVE_MMX)
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v210_x86_init(s);
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}
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if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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y = (uint16_t*)pic->data[0];
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u = (uint16_t*)pic->data[1];
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v = (uint16_t*)pic->data[2];
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pic->pict_type = AV_PICTURE_TYPE_I;
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pic->key_frame = 1;
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for (h = 0; h < avctx->height; h++) {
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const uint32_t *src = (const uint32_t*)psrc;
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uint32_t val;
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w = (avctx->width / 6) * 6;
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s->unpack_frame(src, y, u, v, w);
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y += w;
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u += w >> 1;
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v += w >> 1;
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src += (w << 1) / 3;
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if (w < avctx->width - 1) {
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READ_PIXELS(u, y, v);
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val = av_le2ne32(*src++);
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*y++ = val & 0x3FF;
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if (w < avctx->width - 3) {
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*u++ = (val >> 10) & 0x3FF;
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*y++ = (val >> 20) & 0x3FF;
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val = av_le2ne32(*src++);
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*v++ = val & 0x3FF;
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*y++ = (val >> 10) & 0x3FF;
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}
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}
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psrc += stride;
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y += pic->linesize[0] / 2 - avctx->width;
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u += pic->linesize[1] / 2 - avctx->width / 2;
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v += pic->linesize[2] / 2 - avctx->width / 2;
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}
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if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
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/* we have interlaced material flagged in container */
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pic->interlaced_frame = 1;
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if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
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pic->top_field_first = 1;
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}
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*got_frame = 1;
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return avpkt->size;
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}
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#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption v210dec_options[] = {
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{"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), FF_OPT_TYPE_INT,
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{.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
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{NULL}
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};
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static const AVClass v210dec_class = {
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"V210 Decoder",
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av_default_item_name,
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v210dec_options,
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LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_v210_decoder = {
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.name = "v210",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_V210,
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.priv_data_size = sizeof(V210DecContext),
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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.priv_class = &v210dec_class,
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};
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